Monday, April 25, 2011
Taken as a whole, energy sources with low or no carbon emissions could easily cover the global energy supply in 2050, according to a new Danish report. The challenge for a sustainable global energy system with low carbon emissions will be to use this potential in the energy system the best way possible seen from an economic point of view.
Sunday, April 24, 2011
A groundbreaking new equation could do for organic semiconductors what the Shockley ideal diode equation did for inorganic semiconductors: help to enable their wider adoption.
Saturday, April 23, 2011
Researchers have demonstrated a new solar cell design that can not only convert the full spectrum of sunlight to electrical energy, it is also practical to make using common manufacturing techniques in the semiconductor industry.
Thursday, April 21, 2011
New ultra-clean nanowires will have a central role in the development of new high-efficiency solar cells and electronics on a nanometer scale.
Wednesday, April 20, 2011
Physicists have discovered new properties in a material that could result in efficient and inexpensive plastic solar cells. The discovery reveals that excitons, or energy-carrying particles generated by photons, can travel on the order of a thousand times farther in organic semiconductors than scientists previously observed. This boosts scientists' hopes that organic solar cells may one day overtake silicon in cost and performance.
Tuesday, April 19, 2011
A new technique analyzes the reflection of neutrons to locate buckyballs within composite materials. The work may lead to more effective research on photovoltaic devices.
Sunday, April 17, 2011
Scientists have shown that water-gel-based solar devices -- "artificial leaves" -- can act like solar cells to produce electricity. The findings prove the concept for making solar cells that more closely mimic nature. They also have the potential to be less expensive and more environmentally friendly than the current standard-bearer: silicon-based solar cells.
Saturday, April 16, 2011
Scientists report success in boosting the ability of zinc oxide solar cells to absorb visible light simply by applying a blended mixture of various off-the-shelf dyes commonly used in food and medical industries -- in a soak-then-dry procedure not unlike that used to color a tee-shirt in a home washing machine.
Friday, April 15, 2011
NASA has chosen the Naval Research Laboratory's Wide-field Imager to be part of the Solar Probe Plus mission slated for launch no later than 2018. The Solar Probe Plus, a small car-sized spacecraft will plunge directly into the sun's atmosphere approximately four million miles from our star's surface. It will explore a region no other spacecraft ever has encountered in an effort to unlock the sun's biggest mysteries.
Wednesday, April 13, 2011
Conductive polymers are plastic materials with high electrical conductivity that promise to revolutionize a wide range of products including TV displays, solar cells and biomedical sensors. Researchers now report how to visualize and study the process of energy transport along one single conductive polymer molecule at a time, a key step towards bringing these exciting new applications to market.
Tuesday, April 12, 2011
Alternative energy use at forward operating bases can save dollars, lives, say US military researchers
To cut down on convoys trucking fuel to forward operating bases, as well as implement the Department of the Navy's vision for energy efficiency, the Office of Naval Research and elements within the Marine Corps have successfully demonstrated their goal to reduce petroleum and energy usage in remote locations in Afghanistan.
Sunday, April 10, 2011
Water is a valuable resource, which is why researchers are demonstrating how we can extract precious drinking water from air, discover a leak in pipeline systems and even effectively clean sewage water.
Saturday, April 9, 2011
Is the hornet our key to renewable energy? Physicist discovers that hornet's outer shell can harvest solar power
The brown and yellow parts of the Oriental hornet's body are able to harvest solar energy, and if that function can be mimicked, a novel way of achieving high-efficiency solar energy collection might be just around the corner, says a physicist who has demonstrated that the brown and yellow stripes on the insect's abdomen can absorb the sun's radiation, and the yellow pigment transforms that radiation into electric power.
Friday, April 8, 2011
A new method of predicting solar storms that could help to avoid widespread power and communications blackouts costing billions of pounds has been launched by researchers in the UK.
Wednesday, April 6, 2011
Researchers have developed a process for fabricating more efficient polymer solar cells. They discovered a textured substrate pattern that allows deposition of a uniformly thin light-absorbing layer. The result is a polymer solar cell that captures more light and produces more power.
Tuesday, April 5, 2011
Micro-scaled photovoltaic devices may one day be used to deliver chemotherapeutic drugs directly to tumors, rendering chemotherapy less toxic to surrounding tissue.
Sunday, April 3, 2011
Researchers have developed a new system to monitor how clouds affect large-scale solar photovoltaic power plants. By observing cloud shape, size and movement, the system provides a way for utility companies to predict and prepare for fluctuations in power output due to changes in weather. The resulting models will provide utility companies with valuable data to assess potential power plant locations, ramp rates and power output.
Friday, April 1, 2011
Using wind energy where the wind blows strongest makes perfect sense as long as the energy can be readily transported to where it is needed. The first offshore plants are already being erected, and many more are planned. But the farther they are away from the coast, the more urgent becomes the problem of transferring the current with as low a loss as possible. Over long distances, this is possible only with direct current.